William Kemp

(male) Probably the most successful of all the Old French names of Germanic origin that were introduced to England by the Normans. It is derived from Germanic wil ‘will, desire’ + helm ‘helmet, protection’. The fact that it was borne by the Conqueror himself does not seem to have inhibited its favour with the ‘conquered’ population: in the first century after the Conquest it was the commonest male name of all, and not only among the Normans. In the later Middle Ages it was overtaken by John, but continued to run second to that name until the 20th century, when the picture became more fragmented.

English, Scottish, Dutch, and North German: status name for a champion, Middle English and Middle Low German kempe. In the Middle Ages a champion was a professional fighter on behalf of others; for example the King's Champion, at the coronation, had the duty of issuing a general challenge to battle to anyone who denied the king's right to the throne. The Middle English word corresponds to Old English cempa and Old Norse kempa ‘warrior’; both these go back to Germanic campo ‘warrior’, which is the source of the Dutch and North German name, corresponding to High German Kampf.